Mo. Rev. Stat. § 509.150
Current with changes from the 2023 Legislative Session
When parties sue or are sued as a partnership, and the names of the partners are set forth in the petition or counterclaim, the existence of the partnership shall be deemed confessed unless it be denied by specific negative averment, which shall include such supporting particulars as are peculiarly within the pleader's knowledge.
§ 509.150, RSMo